After Upgrading to Plesk Onyx  About Plesk  Web Servers  Web Hosting  Mail  DNS  Database Servers  Server Administration  Plesk Administration     Plesk Licensing     Securing Plesk        Restricting Administrative Access        Restricting Remote Access via Plesk API        Setting Up the Password Strength Policy        Enhanced Security Mode        Using Secure FTP        Custom Handlers Policy        Securing Plesk and the Mail Server With SSL/TLS Certificates        (Plesk for Windows) Configuring Centralized SSL Certificate Support in Plesk        Protecting Against Clickjacking        Protecting Against Open Redirect        PCI DSS Compliance           Tune Plesk to Meet PCI DSS on Linux           Tune Plesk to Meet PCI DSS on Windows     Ports Used by Plesk     Running Plesk Behind a Router with NAT     Configuring Port Range for Passive FTP Mode (Windows)     Changing Your Password and Contact Information     Plesk Components     Cgroups Manager (Linux)     Managing Plesk from Mobile Devices     Plesk Inside Virtuozzo Containers     Subscribing to Plesk Newsletters     Plesk Technical Reports     Repair Kit     Plesk Repair Utility     Managing ICP Permits     The Plesk Firewall (Linux)     The Plesk Firewall (Windows)     Using Docker     Using Node.js     Panel.ini Configuration File     Managing Let's Encrypt Settings  Customizing the Plesk Interface  Plesk Updates and Upgrades  Plesk Extensions  Statistics and Monitoring  Backing Up and Restoration  File Sharing  Customers and Resellers  Website Management  Appendix A: Properties of Hosting Plans and Subscriptions  Appendix B: Properties of Reseller Plans and Subscriptions